JP2004010281A - Display device for construction machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To certainly display a work screen during work though adopting a safely preferable method displaying an auxiliary screen first at the time of start-up. <P>SOLUTION: When power is supplied, this display device displays an inspection screen showing inspection items of a crane, and displays a setting screen showing crane setting by a first operation of a changeover switch 8, and the work screen showing information necessary for work by a second operation. When an operation lever is operated, the display device displays the work screen as a working state independently of the presence of the operation of the changeover switch 8. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a display device of a construction machine such as a crane (ordinary wheel-type or crawler-type crane, tower crane, barge crane, and the like) and a crumb cell excavator, a crusher, a pile driver, and the like using the crane as a base. .
[0002]
[Prior art]
For example, a crane is equipped with an overload prevention device, and as a part thereof, a display device for displaying various information is incorporated.
[0003]
The display device includes a display unit such as a CRT or a liquid crystal display for displaying information on a screen, and the display unit is installed on a display panel in front of a driver's seat in a driver's cab.
[0004]
Here, while the amount of information to be displayed is extremely large, the display unit is limited to one due to restrictions on the installation position and space, and its size is also limited, so all information is displayed at once. It is difficult to do.
[0005]
So conventionally, information was
(B) Auxiliary information that the operator needs to recognize before work, that is, check items for checking whether or not various safety devices are working properly, the check procedure, crane specifications, boom length, jib Various setting items such as length,
(B) The essential information to be presented to the operator during work, such as the boom angle, jib angle, actual load, rated total load, and load factor, are sorted and displayed on separate screens (auxiliary screen and work screen), and are switched by the operator. The display screen is switched by operating a switch (for example, see Japanese Patent No. 2750740 and Japanese Patent Application Laid-Open No. 7-81887).
[0006]
In this case, from the viewpoint of ensuring safety, it is desirable to prompt the operator to perform a work inspection and check settings before starting work. Therefore, usually, an auxiliary screen is first displayed when the power is turned on, and the operator checks and checks the settings. The operation screen is configured to be switched by operating the changeover switch.
[0007]
[Problems to be solved by the invention]
However, according to the conventional configuration in which the screen displayed on the display unit is switched only by operating the changeover switch as described above, when the operator enters the work while neglecting or forgetting the changeover operation, the screen is displayed on the work screen. Since switching is not performed, essential work information is not presented to the operator, and there is a problem that the risk of falling into an overload state increases.
[0008]
In addition, although the auxiliary screen may be omitted except when necessary, every time the power is turned on, an operation to switch from the auxiliary screen to the work screen must be performed. In addition, there is a problem that this switching operation is troublesome.
[0009]
It is conceivable to adopt a configuration in which the work screen is displayed first and the screen is switched to the auxiliary screen by operating the changeover switch. However, it is not preferable because inspection and setting confirmation may be omitted at all times.
[0010]
Therefore, the present invention provides a display device for a construction machine that can always display an operation screen during operation while adopting a configuration in which an auxiliary screen is displayed at the start.
[0011]
[Means for Solving the Problems]
The invention according to claim 1 includes, as screens to be displayed on the display unit, an auxiliary screen for displaying auxiliary information necessary before work, and a work screen for displaying essential information during work, and the display when power is turned on. A display device for a construction machine configured to display an auxiliary screen on the unit and to switch to the work screen by a switching operation of the switching unit, wherein operation detecting means for detecting that the machine is operating is provided, During operation, the work screen is displayed on the display unit regardless of whether or not the switching means is operated.
[0012]
According to a second aspect of the present invention, in the configuration of the first aspect, the auxiliary screen includes an inspection screen for displaying inspection items and a setting screen for displaying machine setting items. The screen can be switched between the inspection and setting screens.
[0013]
According to a third aspect of the present invention, in the configuration of the second aspect, when the switching means is not operated, an inspection screen is displayed on the display unit, the setting screen is switched by the first operation, and the work screen is switched by the second operation. It is constituted so that it may be performed.
[0014]
According to a fourth aspect of the present invention, in the configuration of the second aspect, when the switching means is not operated, the setting screen is displayed on the display unit, the first operation switches to the inspection screen, and the second operation switches to the work screen. It is constituted so that it may be performed.
[0015]
According to a fifth aspect of the present invention, in the configuration of any one of the first to fourth aspects, the operation detecting means is configured to detect an operation of an operating means for operating the machine.
[0016]
According to a sixth aspect of the present invention, in the configuration of any one of the first to fourth aspects, the motion detecting means is configured to detect a motion of a motion portion of the machine.
[0017]
According to a seventh aspect of the present invention, in the configuration according to any one of the first to sixth aspects, the detection signal from the operation detecting means is not continuously input within a preset time while the work screen is displayed on the display unit. It is configured to automatically switch to the auxiliary screen at times.
[0018]
According to an eighth aspect of the present invention, in the configuration according to any one of the first to seventh aspects, the display section is divided into a main display section and a sub-display section smaller than the main display section. Information necessary for the work is displayed on the sub-display unit, and information necessary for the work is displayed on the main display unit and auxiliary information is displayed on the sub-display unit on the work screen.
[0019]
According to the above configuration, the work screen is displayed during the operation of the machine (during work) regardless of the operation of the switching means while following the method of displaying the auxiliary screen when the power is turned on. Even if the operation is neglected or forgotten, the information necessary for the operation can be reliably presented to the operator.
[0020]
In addition, when inspection and setting confirmation are unnecessary, if the work is started immediately after the auxiliary screen is displayed, the screen is automatically switched to the work screen, so that the trouble of stepping the screen every time the power is turned on is eliminated.
[0021]
According to the second aspect of the present invention, the setting screen and the inspection screen are switched and displayed on the auxiliary screen by operating the switching means. By providing a step of calling attention with the start of operation, safety can be ensured.
[0022]
According to a third aspect of the present invention, the inspection screen is first displayed as an auxiliary screen, and the setting screen is displayed by the first switching operation of the switching means, that is, the inspection screen is displayed first to prompt the operator to perform a work inspection. Therefore, it is preferable in terms of ensuring safety.
[0023]
On the other hand, in claim 4, since the setting screen is displayed first, the operator is alerted by the inspection screen while recognizing the setting contents of the machine, which is more preferable for safety.
[0024]
According to the configuration of claim 5, as a method of detecting that the operation is being performed, since the operation means is detected to be operated, the screen can be quickly switched to the operation screen immediately after the start of the operation.
[0025]
In contrast, in claim 6, a sensor (boom angle) originally provided for overload monitoring of a crane or a construction machine having a crane as a base for detecting the movement of the operating portion of the machine based on the operation of the operating means. ) Can be used as a work signal. For this reason, there is no need to newly add a detecting means, which is advantageous in terms of cost and the like.
[0026]
According to the configuration of the seventh aspect, when the work is interrupted while the work screen is displayed, the screen is automatically switched to the auxiliary screen. Can be.
[0027]
In this case, since the operation is determined to be interrupted when the detection signal has not been continued for a certain period of time, there is no inconvenience that the screen is switched unnecessarily as in the case where the screen is switched immediately when the detection signal is interrupted. .
[0028]
According to the configuration of the eighth aspect, the essential work information on the auxiliary screen and the auxiliary information on the work screen are respectively displayed on the sub-display unit, so that maximum information can be presented to the operator and utilized in the work. .
[0029]
BEST MODE FOR CARRYING OUT THE INVENTION
Here, a crane is applied, and a case where a display device is incorporated as a part of the overload prevention device is taken as an example.
[0030]
FIG. 1 shows a block configuration of this display device.
[0031]
An overload prevention device 1 performs a calculation and a control for preventing an overload, and has a calculation control unit 2 also serving as a display controller, and a display including a CRT or a liquid crystal display for displaying various information by a signal from the calculation control unit 2. And the unit 3.
[0032]
Further, as overload monitoring sensors, a boom angle meter 4, a jib angle meter 5, and a load meter 6 are provided, and based on the boom angle, the jib angle, and the hanging load detected by these, the arithmetic and control unit 2 The crane posture, the rated total load and the actual load at that time, and the load factor are determined, and these pieces of information are displayed on the display unit 3, an alarm is issued at a preset load ratio, and the operation of the dangerous crane is performed. It is configured to stop.
[0033]
The crane is provided with an operation lever for each operation (actuator) such as turning, boom raising and lowering, and the control valve is operated by operating the lever to operate the actuator.
[0034]
In this device, a lever operation detector 7 (only one is shown in the figure) for detecting that these operation levers are operated is provided, and a detection signal (operation signal) from the detector 7 and a screen switching signal are provided. The signal (switching signal) of the changeover switch 8 as the switching means is input to the arithmetic and control unit 2.
[0035]
In the arithmetic control unit 2, as screens to be displayed on the display unit 3, an inspection screen A as a first auxiliary screen shown in FIG. 2 and a setting screen B as a second auxiliary screen shown in FIG. A work screen C shown in FIG. 4 is stored.
[0036]
The display contents of each of the screens A, B, and C are as follows. In the figure, a tower type crane (tower crane) is taken as an example.
[0037]
Inspection screen A
In addition to the overload prevention device that is the main safety device, check items for overwind prevention devices such as hook overwinding, jib overwinding, jib second overwinding, tower overwinding, tower second overwinding, and tower lower limit overwinding Displayed with the item number.
[0038]
In addition, the configuration is such that the contents of the screen can be switched to those indicating the inspection procedure for each inspection item by an inspection switch (not shown).
[0039]
Setting screen B
Here, each setting of the crane, ie, crane specification (tower, normal, barge), boom type, boom length, main winding hook weight, number of main windings, jib type, jib length, jib offset angle, Items such as auxiliary hook weight and auxiliary winding number, and respective settings are displayed on the left and right.
[0040]
Further, when an item is changed due to rearrangement, the item and its setting content can be corrected by a setting switch (not shown).
[0041]
Work screen C
Essential work information such as a boom angle, a jib angle, a load factor, an actual load, a rated total load, and a work radius calculated by the arithmetic and control unit 2 based on the sensor signals is displayed.
[0042]
The display unit 3 includes a main display unit 3a that occupies most of the entire area, a sub-display unit 3b smaller than the main display unit 3a, and a fixed display unit that presents the same information in a small size throughout the entire screen. In the screens A, B, and C, the main contents are displayed on the display unit 3a, auxiliary contents (a part of the essential work information and time in the inspection and setting screens B and C, and time in the work screen C). Part of the auxiliary information and the time) are displayed on the sub-display unit 3b in characters smaller than the main display unit 3a.
[0043]
The operation display unit 2 switches the screen displayed on the display unit 3 between the above three types based on an operation signal from the lever operation detector 7 and a switching signal from the changeover switch 8.
[0044]
The operation of this point will be described with reference to the flowchart of FIG.
[0045]
After the start (power-on), it is first determined whether or not the changeover switch 8 has been operated for the first time (step S1). If NO (no changeover operation has been performed), it is determined whether or not the lever operation has been performed in step S2. In this case as well, if the result is NO (the lever is not operated), the inspection screen A of FIG. 2 is displayed on the display unit 3 (step S3).
[0046]
That is, immediately after the power is turned on, the inspection screen A is displayed to prompt the operator to perform a work inspection.
[0047]
Thereafter, when the changeover switch 8 is operated once, YES is determined in the step S1, and the process proceeds to the step S4, where it is determined whether or not the changeover switch 8 is operated twice.
[0048]
Here, in the case of NO (only once operated), it is determined in step S5 whether or not a lever operation has been performed subsequently, as in step S2. In the case of NO, the setting screen B of FIG. 3 is displayed. (Step S6).
[0049]
That is, after the operation inspection, the operator is urged to confirm each setting of the crane, and when there is a change in the content, the operator is prompted to change the setting.
[0050]
When the changeover switch 8 is operated twice, YES is determined in step S4, and the display screen of the display unit 3 is switched to the work screen C in FIG. 4 in step S7, and essential work information is presented to the operator.
[0051]
Thus, immediately after the power is turned on, the screens are sequentially switched to inspection, setting, and work screens A, B, and C in the flow of one operation and two operations of the changeover switch 8.
[0052]
On the other hand, if YES (there is lever operation) in steps S2 and S5, it is determined whether or not a predetermined time has elapsed without the lever being operated again (steps S8 and S9). Assuming that the work has been interrupted, the screen is switched to a screen before lever operation (inspection screen in step S10, setting screen in step S11) in steps S10 and S11.
[0053]
Note that * in steps S10 and S11 indicates the second display, and at this point in time, the memory that the lever operation has been performed is cleared. When the power is turned off, the operation history of the changeover switch 8 is cleared.
[0054]
In this way, by displaying the inspection screen A or the setting screen B during the interruption of the work, if the inspection and the setting confirmation are neglected for the first time, the operator can be prompted to perform the inspection and the setting confirmation again.
[0055]
Also, in the case of YES in steps S2 and S5, that is, when there is a lever operation, except when the work is interrupted thereafter (the case of YES in steps S8 and S9),
a. Whether the changeover switch 8 has been operated until then,
b. How many times the changeover switch 8 has been operated
c. Regardless of what the previous screen is, the work screen C is displayed on the display unit 3 in steps S12 and S13. (If the previous screen is the inspection screen A or the setting screen B, the screen is switched to the work screen C. The screen C is displayed as it is).
[0056]
As described above, the work screen C is always displayed during the work, regardless of whether or not the changeover switch 8 is operated. Therefore, even if the operator neglects or forgets to operate the changeover switch 8, the information necessary for the work can be obtained. It can be reliably presented to the operator.
[0057]
For this reason, there is no danger that the work is performed in a state where the work screen is not displayed as in the related art and the work is overloaded.
[0058]
In the case where re-inspection or setting confirmation is not necessary, such as when resuming after work is stopped, if the work is immediately started, the screen is automatically switched to the work screen C. Eliminate the hassle of operating.
[0059]
Other Embodiments (1) The work screen C shown in FIG. 4 may be configured so that display items can be arbitrarily modified in response to addition or change of an option, change of work content, or the like.
[0060]
(2) The display contents of each of the screens A, B, and C can be selected according to the type of machine (crane, excavator, pile driver, etc.).
[0061]
(3) In the above embodiment, the inspection screen A is displayed first among the inspection screen A and the setting screen B. Alternatively, the setting screen B may be displayed first. In this case, the operator is alerted on the inspection screen while recognizing the setting contents of the machine, which is more preferable for safety.
[0062]
(4) In the above-described embodiment, the case where the inspection screen A and the setting screen B are provided as the auxiliary screens is exemplified. However, only one of them may be displayed as the auxiliary screen, or the size of the display unit 3 may be set. Depending on the relationship between the auxiliary information and the amount of auxiliary information, the auxiliary information may be collectively displayed on one auxiliary screen.
[0063]
(5) In the above embodiment, the operation of the operation lever is detected by the lever operation detector 7 as the operation of the machine. However, the mechanical operation is performed by a signal from the boom angle meter 7, the jib angle meter 5, or the load meter 6. May be detected (operation of a boom or jib, hoisting operation, etc.).
[0064]
With this configuration, there is no need to newly add a detecting unit, so that the device configuration is simple and the cost is low.
[0065]
【The invention's effect】
As described above, according to the present invention, the work screen is always displayed during the work regardless of the operation of the switching means, while following a safe and preferable method of displaying the auxiliary screen when the power is turned on. Therefore, even if the operator neglects or forgets to operate the switching means, it is possible to surely present information essential for the work to the operator and to work safely.
[0066]
In addition, when the auxiliary screen is unnecessary, if the work is started immediately after the auxiliary screen is displayed, the screen is automatically switched to the work screen, so that the trouble of stepping the screen every time the power is turned on is eliminated.
[0067]
Further, according to the present invention, when the work is interrupted in the state where the work screen is displayed, the screen is automatically switched to the auxiliary screen. Etc. can be prompted.
[Brief description of the drawings]
FIG. 1 is a block diagram of a display device according to an embodiment of the present invention.
FIG. 2 is a diagram showing an inspection screen displayed on a display unit of the device.
FIG. 3 is a diagram showing the same setting screen.
FIG. 4 is a diagram showing the work screen.
FIG. 5 is a flowchart for explaining the operation of the apparatus.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Overload prevention device including a display device 2 Arithmetic control part 3 which constitutes a display device 3 Display part 7 Lever operation detector 8 which detects that the machine is in operation by lever operation 8 Changeover switch A Inspection screen B Setting screen C Work screen

Claims (8)

As a screen to be displayed on the display unit, an auxiliary screen that displays auxiliary information necessary before work and a work screen that displays essential information during work are provided.When the power is turned on, the auxiliary screen is displayed on the display unit. A display device for a construction machine configured to switch to the work screen by a switching operation of the switching unit, wherein operation detecting means for detecting that the machine is operating is provided; A display device for a construction machine, wherein a work screen is displayed on the display unit regardless of the presence or absence of the operation of (1). The display device for a construction machine according to claim 1, further comprising an inspection screen for displaying inspection items and a setting screen for displaying machine setting items as auxiliary screens, wherein the auxiliary screen displayed on the display unit by the switching unit. A display device for a construction machine, characterized in that it can be switched between the inspection and setting screens. 3. The display device for a construction machine according to claim 2, wherein when the switching means is not operated, an inspection screen is displayed on the display unit, the first operation switches to the setting screen, and the second operation switches to the work screen. A display device for a construction machine, characterized in that: 3. The display device for a construction machine according to claim 2, wherein when the switching means is not operated, a setting screen is displayed on the display unit, the operation screen is switched by the first operation, and the operation screen is switched by the second operation. A display device for a construction machine, characterized in that: The display device for a construction machine according to any one of claims 1 to 4, wherein the operation detection unit is configured to detect an operation of an operation unit that operates the machine. The display device for a construction machine according to any one of claims 1 to 4, wherein the movement detecting means is configured to detect a movement of a moving part of the machine. The display device for a construction machine according to any one of claims 1 to 6, wherein a detection signal from the operation detection means is not continuously input within a preset time while a work screen is displayed on the display unit. A display device for a construction machine, wherein the display device is automatically switched to an auxiliary screen. The display section is divided into a main display section and a smaller sub-display section, auxiliary information is displayed on the main display section on the auxiliary screen, information necessary for work is displayed on the sub-display section, and work information is displayed on the work screen. 8. The display device for a construction machine according to claim 1, wherein essential information is displayed on a main display unit, and auxiliary information is displayed on a sub display unit.

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